James Murphy sat down with with Jimmy Fallon on Late Night yesterday to chat about the breakup of LCD Soundsystem and the upcoming documentary/concert film Shut Up and Play the Hits, which documents the group's final performance at Madison Square Garden last year and will play in theaters for one night on July 18th. He also chatted about a spec script he wrote for a little sitcom called Seinfeld, and he jammed with Late Night house band the Roots. "If you have an opportunity to play a song you like with the Roots, you do it!" Murphy exclaimed.